The refund window is short, and a reminder is the easiest protection.
Count 60 days from the purchase date, not delivery, and note that date. Add reminders at day 30, day 50 and day 55. Include the support contact and your order number in the reminder text. Check the refund policy for the exact counting rule.
Day 30: review your log. Day 50: decide whether to continue. Day 55: if you want a refund, send the request in writing. Do not leave it to the last day. Our earlier post on step six of the checklist covers the same idea.